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Redback® A 4435A Mixer 4 Input & Message Player
1.5 REAR PANEL CONNECTIONS
Fig 1.5 shows the layout of the A 4435A rear panel.
24V DC
Switched
Trigger 4 Trigger 3 Trigger 2 Trigger 1
Backup
24V Out
24V DC In
Dip 5
1
2
3
4
-
+
11
10
9
8
1
Microphone Inputs
There are four microphone inputs which all incorporate a
each Mic input and is selected via DIP switches on DIP1 - DIP4 (For more details see DIP switch settings).
2
RCA Unbalanced Line Inputs 1+ 2
The line inputs are dual RCA connectors which are internally mixed to produce a mono input signal. The input
sensitivity of these inputs can be adjusted to 100mV or 1V via the DIP switches. These inputs would be suitable
for telephone paging or for connection to an evacuation system. Not recommended for background music when
using message player.
3
RCA Unbalanced Line Inputs 3 +4
The line inputs are dual RCA connectors which are internally mixed to produce a mono input signal. The input
sensitivity of these inputs can be adjusted to 100mV or 1V via the DIP switches. These inputs would be the
preferable inputs for background music (BGM).
4
Dip Switches DIP1 - DIP4
These are used to select various options such as phantom power on mic inputs, Vox options and input sensitivities.
Refer to DIP Switch Settings section.
5
Preamp Out (Balanced Line Output)
A 3 pin 600ohm 1V balanced XLR output is provided for passing the audio signal on to a slave amplifier
or to record the output of the amplifier.
6
Line Out
Dual RCA's provide a line level output for recording purposes or to pass the output on to another amplifier.
7
Remote triggers
These contacts are for remote triggering of the internal MP3 player. There are four contacts which correspond to
the four MP3 files stored in the trigger folders of the SD card.
8
DIP 5
These switches provide various play modes (see DIP switch settings for more details).
9
Switched Out
This is a 24V DC output which is activated when any of the remote triggers are operated. The terminals provided
can be used for "Normal" or "Failsafe" modes. The output terminals have a N/O (normally open), N/C (normally
closed) and a ground connection. In this configuration 24V appears between the N/O and ground terminals when
this output is activated. When this output is not active 24V appears between the N/C and ground terminals.
10
24V DC Input (Backup)
Connects to a 24V DC backup supply with at least 1 amp current capacity. (Please observe the polarity)
11
24V DC input
Connects to a 24V DC Plugpack with 2.1mm Jack.
6
Redback® Proudly Made In Australia
Output
L
2
1
2
1
3
3
R
Line
Mic
Mic
7
6
5
Input 4
Input 3
L
L
2
1
3
R
R
1
2
3
4
5
6
7
8
Line
Dip 4
Dip 3
Line
Mic
3
Fig 1.5
3 pin balanced XLR
1
Input 2
Input 1
L
2
1
3
R
1
2
3
4
5
6
7
8
Mic
Line
Dip 2
Dip 1
Line
4
2
. Phantom power is available at
www.redbackaudio.com.au
Overview
L
2
1
3
R
Mic
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